On 10/10/2012, at 2:15 PM, Dobes Vandermeer wrote:
> Didn't you recently add the "as" syntax which would allow, for example:
>
> if test1 as x1 do
>
> elif test2 as x2 do
>
> elif test3 as x3 do
>
> done
>
> ?
>
> This probably eliminates the nested else if 90% of the time without adding to
> the language.
That only works with expressions. The word "test1" above should be viewed as a
sequence of computations rather than a single function/generator.
It's an issue in Felix that it has both statements and expressions and a lot
of stuff needs to be duplicated.
The actual code I was writing now looks like this:
for line in split (lines,char "\n") do
++count;
var commentry = Match (scomment, StringPiece line, 0, ANCHOR_BOTH,
vcomment.stl_begin, 2);
if commentry do
comments = list (vcomment . 1 . string.strip);
otherwise
commentry = Match (ccomment, StringPiece line, 0, ANCHOR_BOTH,
vcomment.stl_begin, 2);
if commentry do
comments = Cons (vcomment . 1 . string.strip, comments);
otherwise
var m = Match (grexp, StringPiece line, 0, ANCHOR_BOTH, v.stl_begin,n);
if m do
var sym = v.3.string;
var dfn = "";
var m2 = Match (extract, StringPiece line, 0, ANCHOR_BOTH, v2.stl_begin,
n2);
if m2 do
m2 = Match (extract, StringPiece line, 0, ANCHOR_BOTH, v2a.stl_begin,
n2);
if m2 do
dfn = v2a . 1 . string . strip;
else
dfn = v2 . 1 . string . strip;
done
else
dfn = line . strip;
done
if ishtml do
if prefix (dfn, "class") do
println$ f"%04d" count + ": " + '<a href="'+href+'#'+f"%04d"
count+'">'+dfn +'</a>';
for cline in comments do println cline; done
comments = Empty[string];
else
println$ f"%04d" count + ": " + '<a href="'+href+'#'+f"%04d"
count+'">'+ dfn +'</a>';
for cline in comments do println cline; done
comments = Empty[string];
done
else
if prefix (dfn, "class") do
println$ f"%04d" count + ": " + dfn;
for cline in comments do println$ " "+cline; done
comments = Empty[string];
else
println$ f"%04d" count + ": " + dfn;
for cline in comments do println$ " "+ cline; done
comments = Empty[string];
done
done
done
done
Before "otherwise" the third match had to be indented twice and we had
two more "done"s at the end.
Of course in *this* case we might say
if Match ..
And of course I could write, for example:
dfn = if m2 then v2a else v2 endif . 1 . string . strip
or even better if I used expressions instead of statements.
--
john skaller
[email protected]
http://felix-lang.org
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